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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aedff4de341df66d985ec450de2c6030f7fb159d47c7305a11b5c475ffc32490' 
  AND token = '6zXrcfAfxOPFDlAZdf+0gDD1/4/dAOZI0vBHHc6AAS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}